BMW M3 Forum (E90 E92)

BMW Garage BMW Meets Register Today's Posts


Go Back   M3Post - BMW M3 Forum > BIMMERPOST Universal Forums > Off-Topic Discussions Board
 
Post Reply
 
Thread Tools Search this Thread
      01-02-2009, 08:35 AM   #23
BMW_TT
Colonel
224
Rep
2,548
Posts

Drives: E92 335i
Join Date: Aug 2007
Location: Dallas, TX

iTrader: (4)

firefold.com > *
Appreciate 0
      01-02-2009, 09:24 AM   #24
ScotyH
Bimmer me up
19
Rep
340
Posts

Drives: 08 M3, 2010 GTR
Join Date: Sep 2005
Location: Edmonton,AB

iTrader: (0)

120Hz doesn't goes thru the cable. That's a conversion that occurs in the display device. BUT

Quality does matter... most people just don't have the caliber of equipment to reveal the difference.

Most people think that it's "snake oil"..... just like most people think that when you buy a BMW you're "paying for the name".
Appreciate 0
      01-02-2009, 09:37 AM   #25
ZJP
Lieutenant Colonel
United_States
125
Rep
1,759
Posts

Drives: F10 535xi / B6 S4
Join Date: Jan 2008
Location: LI, NY

iTrader: (7)

I buy all my HDMI cables from eBay.
Appreciate 0
      01-02-2009, 09:48 AM   #26
toughluck
First Lieutenant
toughluck's Avatar
United_States
45
Rep
360
Posts

Drives: 2007 e92
Join Date: Apr 2006
Location: Pie in the Sky

iTrader: (1)

I used to buy Monster cable when I was younger, but after knowing more, I will never touch that brand again. Stay clear of the "Beats by Dr. Dre Headphones" from Monster, too.

(a little off topic), but read this article from engadget...

Monster-cable-still-evil-will-allow-monster-mini-golf-to-exist

Direct link Monster Mini Golf
__________________
r56 MINI Cooper S pepper white/redwood lounge leather (sold)
e92 335i red/saddle leather
e90 325i red/beige/clearbra - retired.
Appreciate 0
      01-02-2009, 10:07 AM   #27
miktrebla09
Private First Class
5
Rep
180
Posts

Drives: biped
Join Date: Aug 2006
Location: Seoul / Boston

iTrader: (0)

Quote:
Originally Posted by bwalshy99 View Post
if you have an expensive tv that refreshes at 120Hz and you buy an HDMI cable that is not capable of 120Hz than you just wasted on that money on a big fancy tv. I'm not saying you need to buy particular brands but certain specs of the cables are important such as the frequency and what materials are used.
Nice...you're exactly the type of consumer Monster preys on.

As someone else mentioned in this thread, 120hz processing is strictly processed by your TV and NOT the hdmi source.

taken from avsforum:

"1) There is no such thing as 120Hz rated cables.
2) Even if there was your HDTV only accepts 24p & 60p over HDMI. While it displays at 120Hz it still only accepts a 24Hz or 60Hz signal. There are no consumer grade HDTV with a 120p input. Period.

3) Even if there were 120Hz cables (there aren't) and your HDTV accepted 120p input (it doesn't) no BD player has 120Hz (120p) output. Since content on the disc is 24p there is no reason to output it as 120p. It is output as 24p (using less bandwidth than 60p) and your HDTV applies a 5:5 pulldown to 120Hz.

Someday there may be sources (PS4, xbox 720) with an 120Hz output and someday there may be HDTV with 120p input but even those would just need an HDMI cable.
"
Appreciate 0
      01-02-2009, 10:33 AM   #28
J!M
Private
2
Rep
78
Posts

Drives: E90 M3
Join Date: Jul 2008
Location: NC

iTrader: (0)

I just bought a cheap HDMI cable yesterday to replace an HDMI that came with one of my devices.

The cable I'm replacing seems to have a problem that it doesn't make a solid connection in the hdmi port, so the picture works fine for a while, and then stops working if the temperature changes, or it moves at all.

As a result, I went one step above the cheapest cheap cables hoping that the connector will be a bit better. My other 2 cheap HDMI cables have always worked fine for me.
Appreciate 0
      01-02-2009, 10:45 AM   #29
ZBMW
Black Forest Bimmerphile
United_States
2
Rep
137
Posts

Drives: 2007 335i
Join Date: Jan 2007
Location: Colorado

iTrader: (1)

If anyone here is interested in some very good testing of HDMI cables Audioholics.com just posted their results on their front page. It pretty well blows apart that 120 mhz capable cable, as did others posters here.
Anyone who plans to make some long runs to sets previously supplied by RG6 cable should read it.
Appreciate 0
      01-02-2009, 11:06 AM   #30
JJM335
Second Lieutenant
United_States
7
Rep
229
Posts

Drives: 2008 E92 M3
Join Date: May 2007
Location: GA

iTrader: (0)

Garage List
2008 E92 M3  [0.00]
Quote:
Originally Posted by bwalshy99 View Post
explain otherwise if you know better...
I am a video network engineer, so I guess I do know better. :-)

Seriously, the bandwidth of HD is the same regardless of the 120Hz hoopla...about 1.2Gb/s for anyone interested. The 120Hz function resides in the TV itself and has nothing to do with the HDMI cable or with encoding of the HD video for that matter.

Back on topic, a cheap HDMI cable is just as good as the most expensive one you can find...with one exception. Someone pointed out distance. So, if you have a very long cable run (like more that 50') there may be some signal degradation that could result in reduced picture quality (most likely tiling and macroblocking from bit errors and lost MPEG video packets).
Appreciate 0
      01-02-2009, 11:09 AM   #31
Inzane
Lieutenant
Inzane's Avatar
Canada
25
Rep
443
Posts

Drives: E90 LCI 335i
Join Date: Mar 2008
Location: Edmonton, Alberta

iTrader: (0)

Ok, so HDMI cables have been beat to death here already.

What about:
- component cables
- RCA/composite audio & video cables
- speaker wire
- subwoofer cable

Does the same apply to all those as well, or is there some notable variance in "quality" in some cases?
(ps - I have never bought any Monster Cable anything)
Appreciate 0
      01-02-2009, 03:00 PM   #32
Hedges
Major General
Hedges's Avatar
116
Rep
5,178
Posts

Drives: 12 C63 AMG
Join Date: Jul 2008
Location: Toronto

iTrader: (8)

Interesting, very informative!
Appreciate 0
      01-02-2009, 03:40 PM   #33
JJM335
Second Lieutenant
United_States
7
Rep
229
Posts

Drives: 2008 E92 M3
Join Date: May 2007
Location: GA

iTrader: (0)

Garage List
2008 E92 M3  [0.00]
Quote:
Originally Posted by Inzane View Post
Ok, so HDMI cables have been beat to death here already.

What about:
- component cables
- RCA/composite audio & video cables
- speaker wire
- subwoofer cable

Does the same apply to all those as well, or is there some notable variance in "quality" in some cases?
(ps - I have never bought any Monster Cable anything)
As a general rule, cable is cable. However, analog signals like component, composite, amplifier output (speaker wire), ect. can benefit from higher quality cable. Very few people in very few instances would be able to tell any difference, though.
Appreciate 0
      01-02-2009, 09:02 PM   #34
darkalley
Captain
United_States
85
Rep
655
Posts

Drives: Gone- 08 DCT SSII, 2006 SMG
Join Date: Dec 2006
Location: Current: 2014 BMW 4-Series Convert for the fiance w M Package, F150, 06 S2000, 08 911 c4s

iTrader: (0)

Quote:
Originally Posted by ZBMW View Post
If anyone here is interested in some very good testing of HDMI cables Audioholics.com just posted their results on their front page. It pretty well blows apart that 120 mhz capable cable, as did others posters here.
Anyone who plans to make some long runs to sets previously supplied by RG6 cable should read it.


Anybody familiar with HDMI will know that the bandwidth demand placed upon the cable is a function of the bitrate flowing through that cable. The bitrate, in turn, is a function of the resolution, frame rate, and color depth of the picture. The argument here is obvious enough: 120Hz signal has double the frame rate of 60Hz signal, and therefore needs double the bandwidth. That seems simple and straightforward enough, and it would be true, but for one thing: It's NOT. It simply makes a critical, incorrect, unstated assumption.

The incorrect assumption here is that the new doubled refresh rate is transmitted over the cable. It's not. Your cable needs to handle the frame rate which passes through the cable, but it doesn't care what the frame rate at any other point in the process is. If the cable is carrying a 60 Hz frame rate, and the display doubles that to 120 Hz to refresh the screen twice as often, your cable only "sees" 60, not 120. The bandwidth demand placed on the cable has to do with the signal coming from the source and into the display--what the display may do with that signal internally, after it has passed through the cable, has nothing to do with the load on the cable. Nobody feeds video at 120 Hz, because it doesn't make any sense to do so--when the original content is not recorded at 120 frames per second, there's no gain to be had in sending each frame multiple times to the display, and it would make the sending and receiving chipsets costlier while making the whole interface less reliable due to the increased bandwidth demand placed on the cable. In fact, most (perhaps all) of the "120 Hertz" displays on the market cannot and will not accept an input signal with a 120 Hertz frame rate. Read that last sentence twice if you're still confused.

Whether your display's internal refresh rate is 120 Hertz or some other rate, the signals coming in are running at frame rates determined by the sources of those signals. This typically means 30 Hertz for interlaced formats like 1080i, 60 Hertz for progressive formats like 720p or 480p, or 24 Hertz for certain players that support 1080p/24. Those signal frame rates, not your display's internal refresh rate, are what your cable must handle.
__________________
2008 SSII DCT M3/Peapack/Parsippany NJ
Appreciate 0
      01-02-2009, 10:46 PM   #35
skierman64
Brigadier General
skierman64's Avatar
United_States
127
Rep
3,071
Posts

Drives: E92M3-E46M3-E46Wagon-E89Z4-E36
Join Date: Dec 2006
Location: Greater St Louis Metro area

iTrader: (1)

Garage List
1994 325is Race Car  [0.00]
2011 BMW Z4  [0.00]
1998 M3 Coupe  [0.00]
2008 M3 Coupe  [0.00]
Quote:
Originally Posted by Inzane View Post
Ok, so HDMI cables have been beat to death here already.

What about:
- component cables
- RCA/composite audio & video cables
- speaker wire
- subwoofer cable

Does the same apply to all those as well, or is there some notable variance in "quality" in some cases?
(ps - I have never bought any Monster Cable anything)
The type of wire does effect analog signals going through the wire. The 4 items you mention above are usually analog and therefore will be effected the quality of wire/cable.

Quote:
Originally Posted by darkalley View Post
Anybody familiar with HDMI will know that the bandwidth demand placed upon the cable is a function of the bitrate flowing through that cable. The bitrate, in turn, is a function of the resolution, frame rate, and color depth of the picture. The argument here is obvious enough: 120Hz signal has double the frame rate of 60Hz signal, and therefore needs double the bandwidth. That seems simple and straightforward enough, and it would be true, but for one thing: It's NOT. It simply makes a critical, incorrect, unstated assumption.

The incorrect assumption here is that the new doubled refresh rate is transmitted over the cable. It's not. Your cable needs to handle the frame rate which passes through the cable, but it doesn't care what the frame rate at any other point in the process is. If the cable is carrying a 60 Hz frame rate, and the display doubles that to 120 Hz to refresh the screen twice as often, your cable only "sees" 60, not 120. The bandwidth demand placed on the cable has to do with the signal coming from the source and into the display--what the display may do with that signal internally, after it has passed through the cable, has nothing to do with the load on the cable. Nobody feeds video at 120 Hz, because it doesn't make any sense to do so--when the original content is not recorded at 120 frames per second, there's no gain to be had in sending each frame multiple times to the display, and it would make the sending and receiving chipsets costlier while making the whole interface less reliable due to the increased bandwidth demand placed on the cable. In fact, most (perhaps all) of the "120 Hertz" displays on the market cannot and will not accept an input signal with a 120 Hertz frame rate. Read that last sentence twice if you're still confused.

Whether your display's internal refresh rate is 120 Hertz or some other rate, the signals coming in are running at frame rates determined by the sources of those signals. This typically means 30 Hertz for interlaced formats like 1080i, 60 Hertz for progressive formats like 720p or 480p, or 24 Hertz for certain players that support 1080p/24. Those signal frame rates, not your display's internal refresh rate, are what your cable must handle.
Great explanation. Thanks.
__________________
Invest Wisely...The best mod for your money?? BMWCCA high performance driver's school. The mod that lasts a lifetime and improves the performance of any car you drive[/LEFT]
Appreciate 0
Post Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 03:32 AM.




m3post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST